Open64: osprey/cygnus/bfd/elfarm-oabi.c Source File

00001 /* 32-bit ELF support for ARM old abi option.
00002    Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
00003 
00004    This file is part of BFD, the Binary File Descriptor library.
00005 
00006    This program is free software; you can redistribute it and/or modify
00007    it under the terms of the GNU General Public License as published by
00008    the Free Software Foundation; either version 2 of the License, or
00009    (at your option) any later version.
00010 
00011    This program is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014    GNU General Public License for more details.
00015 
00016    You should have received a copy of the GNU General Public License
00017    along with this program; if not, write to the Free Software
00018    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
00019 
00020 #define OLD_ARM_ABI
00021 #define bfd_elf32_arm_allocate_interworking_sections \
00022   bfd_elf32_arm_oabi_allocate_interworking_sections
00023 #define bfd_elf32_arm_get_bfd_for_interworking \
00024   bfd_elf32_arm_oabi_get_bfd_for_interworking
00025 #define bfd_elf32_arm_process_before_allocation \
00026   bfd_elf32_arm_oabi_process_before_allocation
00027 #define bfd_elf32_arm_add_glue_sections_to_bfd \
00028   bfd_elf32_arm_oabi_add_glue_sections_to_bfd
00029 
00030 #include "elf/arm.h"
00031 #include "bfd.h"
00032 #include "sysdep.h"
00033 #include "libbfd.h"
00034 #include "elf-bfd.h"
00035 
00036 #ifndef NUM_ELEM
00037 #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
00038 #endif
00039 
00040 #define TARGET_LITTLE_SYM               bfd_elf32_littlearm_oabi_vec
00041 #define TARGET_LITTLE_NAME              "elf32-littlearm-oabi"
00042 #define TARGET_BIG_SYM                  bfd_elf32_bigarm_oabi_vec
00043 #define TARGET_BIG_NAME                 "elf32-bigarm-oabi"
00044 
00045 #define elf_info_to_howto               elf32_arm_info_to_howto
00046 #define elf_info_to_howto_rel           0
00047 
00048 #define ARM_ELF_ABI_VERSION   0
00049 #define ARM_ELF_OS_ABI_VERSION    0
00050 
00051 static reloc_howto_type * find_howto                  PARAMS ((unsigned int));
00052 static void               elf32_arm_info_to_howto     PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
00053 static reloc_howto_type * elf32_arm_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type));
00054 
00055 static reloc_howto_type elf32_arm_howto_table[] =
00056   {
00057     /* No relocation.  */
00058     HOWTO (R_ARM_NONE,    /* type */
00059      0,     /* rightshift */
00060      0,     /* size (0 = byte, 1 = short, 2 = long) */
00061      0,     /* bitsize */
00062      FALSE,   /* pc_relative */
00063      0,     /* bitpos */
00064      complain_overflow_dont,  /* complain_on_overflow */
00065      bfd_elf_generic_reloc, /* special_function */
00066      "R_ARM_NONE",  /* name */
00067      FALSE,   /* partial_inplace */
00068      0,     /* src_mask */
00069      0,     /* dst_mask */
00070      FALSE),    /* pcrel_offset */
00071 
00072     HOWTO (R_ARM_PC24,    /* type */
00073      2,     /* rightshift */
00074      2,     /* size (0 = byte, 1 = short, 2 = long) */
00075      24,      /* bitsize */
00076      TRUE,    /* pc_relative */
00077      0,     /* bitpos */
00078      complain_overflow_signed,  /* complain_on_overflow */
00079      bfd_elf_generic_reloc, /* special_function */
00080      "R_ARM_PC24",  /* name */
00081      FALSE,   /* partial_inplace */
00082      0x00ffffff,    /* src_mask */
00083      0x00ffffff,    /* dst_mask */
00084      TRUE),     /* pcrel_offset */
00085 
00086     /* 32 bit absolute.  */
00087     HOWTO (R_ARM_ABS32,   /* type */
00088      0,     /* rightshift */
00089      2,     /* size (0 = byte, 1 = short, 2 = long) */
00090      32,      /* bitsize */
00091      FALSE,   /* pc_relative */
00092      0,     /* bitpos */
00093      complain_overflow_bitfield,  /* complain_on_overflow */
00094      bfd_elf_generic_reloc, /* special_function */
00095      "R_ARM_ABS32", /* name */
00096      FALSE,   /* partial_inplace */
00097      0xffffffff,    /* src_mask */
00098      0xffffffff,    /* dst_mask */
00099      FALSE),    /* pcrel_offset */
00100 
00101     /* Standard 32bit pc-relative reloc.  */
00102     HOWTO (R_ARM_REL32,   /* type */
00103      0,     /* rightshift */
00104      2,     /* size (0 = byte, 1 = short, 2 = long) */
00105      32,      /* bitsize */
00106      TRUE,    /* pc_relative */
00107      0,     /* bitpos */
00108      complain_overflow_bitfield,  /* complain_on_overflow */
00109      bfd_elf_generic_reloc, /* special_function */
00110      "R_ARM_REL32", /* name */
00111      FALSE,   /* partial_inplace */
00112      0xffffffff,    /* src_mask */
00113      0xffffffff,    /* dst_mask */
00114      TRUE),   /* pcrel_offset */
00115 
00116     /* 8 bit absolute.  */
00117     HOWTO (R_ARM_ABS8,    /* type */
00118      0,     /* rightshift */
00119      0,     /* size (0 = byte, 1 = short, 2 = long) */
00120      8,     /* bitsize */
00121      FALSE,   /* pc_relative */
00122      0,     /* bitpos */
00123      complain_overflow_bitfield,  /* complain_on_overflow */
00124      bfd_elf_generic_reloc, /* special_function */
00125      "R_ARM_ABS8",  /* name */
00126      FALSE,   /* partial_inplace */
00127      0x000000ff,    /* src_mask */
00128      0x000000ff,    /* dst_mask */
00129      FALSE),    /* pcrel_offset */
00130 
00131     /* 16 bit absolute.  */
00132     HOWTO (R_ARM_ABS16,   /* type */
00133      0,     /* rightshift */
00134      1,     /* size (0 = byte, 1 = short, 2 = long) */
00135      16,      /* bitsize */
00136      FALSE,   /* pc_relative */
00137      0,     /* bitpos */
00138      complain_overflow_bitfield,  /* complain_on_overflow */
00139      bfd_elf_generic_reloc, /* special_function */
00140      "R_ARM_ABS16", /* name */
00141      FALSE,   /* partial_inplace */
00142      0,     /* src_mask */
00143      0,     /* dst_mask */
00144      FALSE),    /* pcrel_offset */
00145 
00146     /* 12 bit absolute.  */
00147     HOWTO (R_ARM_ABS12,   /* type */
00148      0,     /* rightshift */
00149      2,     /* size (0 = byte, 1 = short, 2 = long) */
00150      12,      /* bitsize */
00151      FALSE,   /* pc_relative */
00152      0,     /* bitpos */
00153      complain_overflow_bitfield,  /* complain_on_overflow */
00154      bfd_elf_generic_reloc, /* special_function */
00155      "R_ARM_ABS12", /* name */
00156      FALSE,   /* partial_inplace */
00157      0x000008ff,    /* src_mask */
00158      0x000008ff,    /* dst_mask */
00159      FALSE),    /* pcrel_offset */
00160 
00161     HOWTO (R_ARM_THM_ABS5,  /* type */
00162      6,     /* rightshift */
00163      1,     /* size (0 = byte, 1 = short, 2 = long) */
00164      5,     /* bitsize */
00165      FALSE,   /* pc_relative */
00166      0,     /* bitpos */
00167      complain_overflow_bitfield,  /* complain_on_overflow */
00168      bfd_elf_generic_reloc, /* special_function */
00169      "R_ARM_THM_ABS5",  /* name */
00170      FALSE,   /* partial_inplace */
00171      0x000007e0,    /* src_mask */
00172      0x000007e0,    /* dst_mask */
00173      FALSE),    /* pcrel_offset */
00174 
00175     HOWTO (R_ARM_THM_PC22,  /* type */
00176      1,     /* rightshift */
00177      2,     /* size (0 = byte, 1 = short, 2 = long) */
00178      23,      /* bitsize */
00179      TRUE,    /* pc_relative */
00180      0,     /* bitpos */
00181      complain_overflow_signed,  /* complain_on_overflow */
00182      bfd_elf_generic_reloc, /* special_function */
00183      "R_ARM_THM_PC22",  /* name */
00184      FALSE,   /* partial_inplace */
00185      0x07ff07ff,    /* src_mask */
00186      0x07ff07ff,    /* dst_mask */
00187      TRUE),     /* pcrel_offset */
00188 
00189     HOWTO (R_ARM_SBREL32,   /* type */
00190      0,     /* rightshift */
00191      0,     /* size (0 = byte, 1 = short, 2 = long) */
00192      0,     /* bitsize */
00193      FALSE,   /* pc_relative */
00194      0,     /* bitpos */
00195      complain_overflow_dont,/* complain_on_overflow */
00196      bfd_elf_generic_reloc, /* special_function */
00197      "R_ARM_SBREL32", /* name */
00198      FALSE,   /* partial_inplace */
00199      0,     /* src_mask */
00200      0,     /* dst_mask */
00201      FALSE),    /* pcrel_offset */
00202 
00203     HOWTO (R_ARM_AMP_VCALL9,  /* type */
00204      1,     /* rightshift */
00205      1,     /* size (0 = byte, 1 = short, 2 = long) */
00206      8,     /* bitsize */
00207      TRUE,    /* pc_relative */
00208      0,     /* bitpos */
00209      complain_overflow_signed,  /* complain_on_overflow */
00210      bfd_elf_generic_reloc, /* special_function */
00211      "R_ARM_AMP_VCALL9",  /* name */
00212      FALSE,   /* partial_inplace */
00213      0x000000ff,    /* src_mask */
00214      0x000000ff,    /* dst_mask */
00215      TRUE),   /* pcrel_offset */
00216 
00217     /* 12 bit pc relative.  */
00218     HOWTO (R_ARM_THM_PC11,  /* type */
00219      1,     /* rightshift */
00220      1,     /* size (0 = byte, 1 = short, 2 = long) */
00221      11,      /* bitsize */
00222      TRUE,    /* pc_relative */
00223      0,     /* bitpos */
00224      complain_overflow_signed,  /* complain_on_overflow */
00225      bfd_elf_generic_reloc, /* special_function */
00226      "R_ARM_THM_PC11",  /* name */
00227      FALSE,   /* partial_inplace */
00228      0x000007ff,    /* src_mask */
00229      0x000007ff,    /* dst_mask */
00230      TRUE),   /* pcrel_offset */
00231 
00232     /* 12 bit pc relative.  */
00233     HOWTO (R_ARM_THM_PC9, /* type */
00234      1,     /* rightshift */
00235      1,     /* size (0 = byte, 1 = short, 2 = long) */
00236      8,     /* bitsize */
00237      TRUE,    /* pc_relative */
00238      0,     /* bitpos */
00239      complain_overflow_signed,  /* complain_on_overflow */
00240      bfd_elf_generic_reloc, /* special_function */
00241      "R_ARM_THM_PC9", /* name */
00242      FALSE,   /* partial_inplace */
00243      0x000000ff,    /* src_mask */
00244      0x000000ff,    /* dst_mask */
00245      TRUE),   /* pcrel_offset */
00246 
00247     /* GNU extension to record C++ vtable hierarchy.  */
00248     HOWTO (R_ARM_GNU_VTINHERIT, /* type */
00249      0,                     /* rightshift */
00250      2,                     /* size (0 = byte, 1 = short, 2 = long) */
00251      0,                     /* bitsize */
00252      FALSE,                 /* pc_relative */
00253      0,                     /* bitpos */
00254      complain_overflow_dont, /* complain_on_overflow */
00255      NULL,                  /* special_function */
00256      "R_ARM_GNU_VTINHERIT", /* name */
00257      FALSE,                 /* partial_inplace */
00258      0,                     /* src_mask */
00259      0,                     /* dst_mask */
00260      FALSE),                /* pcrel_offset */
00261 
00262     /* GNU extension to record C++ vtable member usage.  */
00263     HOWTO (R_ARM_GNU_VTENTRY,     /* type */
00264      0,                     /* rightshift */
00265      2,                     /* size (0 = byte, 1 = short, 2 = long) */
00266      0,                     /* bitsize */
00267      FALSE,                 /* pc_relative */
00268      0,                     /* bitpos */
00269      complain_overflow_dont, /* complain_on_overflow */
00270      _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
00271      "R_ARM_GNU_VTENTRY",   /* name */
00272      FALSE,                 /* partial_inplace */
00273      0,                     /* src_mask */
00274      0,                     /* dst_mask */
00275      FALSE),                /* pcrel_offset */
00276 
00277     /* XXX - gap in index numbering here.  */
00278 
00279     HOWTO (R_ARM_PLT32,   /* type */
00280      2,                   /* rightshift */
00281      2,                   /* size (0 = byte, 1 = short, 2 = long) */
00282      26,                  /* bitsize */
00283      TRUE,    /* pc_relative */
00284      0,                   /* bitpos */
00285      complain_overflow_bitfield,/* complain_on_overflow */
00286      bfd_elf_generic_reloc, /* special_function */
00287      "R_ARM_PLT32", /* name */
00288      TRUE,    /* partial_inplace */
00289      0x00ffffff,    /* src_mask */
00290      0x00ffffff,    /* dst_mask */
00291      TRUE),     /* pcrel_offset */
00292 
00293     /* XXX - gap in index numbering here.  */
00294 
00295     HOWTO (R_ARM_RREL32,  /* type */
00296      0,     /* rightshift */
00297      0,     /* size (0 = byte, 1 = short, 2 = long) */
00298      0,     /* bitsize */
00299      FALSE,   /* pc_relative */
00300      0,     /* bitpos */
00301      complain_overflow_dont,  /* complain_on_overflow */
00302      bfd_elf_generic_reloc, /* special_function */
00303      "R_ARM_RREL32",  /* name */
00304      FALSE,   /* partial_inplace */
00305      0,     /* src_mask */
00306      0,     /* dst_mask */
00307      FALSE),    /* pcrel_offset */
00308 
00309     HOWTO (R_ARM_RABS32,  /* type */
00310      0,     /* rightshift */
00311      0,     /* size (0 = byte, 1 = short, 2 = long) */
00312      0,     /* bitsize */
00313      FALSE,   /* pc_relative */
00314      0,     /* bitpos */
00315      complain_overflow_dont,  /* complain_on_overflow */
00316      bfd_elf_generic_reloc, /* special_function */
00317      "R_ARM_RABS32",  /* name */
00318      FALSE,   /* partial_inplace */
00319      0,     /* src_mask */
00320      0,     /* dst_mask */
00321      FALSE),    /* pcrel_offset */
00322 
00323     HOWTO (R_ARM_RPC24,   /* type */
00324      0,     /* rightshift */
00325      0,     /* size (0 = byte, 1 = short, 2 = long) */
00326      0,     /* bitsize */
00327      FALSE,   /* pc_relative */
00328      0,     /* bitpos */
00329      complain_overflow_dont,  /* complain_on_overflow */
00330      bfd_elf_generic_reloc, /* special_function */
00331      "R_ARM_RPC24", /* name */
00332      FALSE,   /* partial_inplace */
00333      0,     /* src_mask */
00334      0,     /* dst_mask */
00335      FALSE),    /* pcrel_offset */
00336 
00337     HOWTO (R_ARM_RBASE,   /* type */
00338      0,     /* rightshift */
00339      0,     /* size (0 = byte, 1 = short, 2 = long) */
00340      0,     /* bitsize */
00341      FALSE,   /* pc_relative */
00342      0,     /* bitpos */
00343      complain_overflow_dont,  /* complain_on_overflow */
00344      bfd_elf_generic_reloc, /* special_function */
00345      "R_ARM_RBASE", /* name */
00346      FALSE,   /* partial_inplace */
00347      0,     /* src_mask */
00348      0,     /* dst_mask */
00349      FALSE)   /* pcrel_offset */
00350   };
00351 
00352 /* Locate a reloc in the howto table.  This function must be used
00353    when the entry number is is > R_ARM_GNU_VTINHERIT.  */
00354 
00355 static reloc_howto_type *
00356 find_howto (r_type)
00357      unsigned int r_type;
00358 {
00359   int i;
00360 
00361   for (i = NUM_ELEM (elf32_arm_howto_table); i--;)
00362     if (elf32_arm_howto_table [i].type == r_type)
00363       return elf32_arm_howto_table + i;
00364 
00365   return NULL;
00366 }
00367 
00368 static void
00369 elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc)
00370      bfd *abfd ATTRIBUTE_UNUSED;
00371      arelent *bfd_reloc;
00372      Elf_Internal_Rela *elf_reloc;
00373 {
00374   unsigned int r_type;
00375 
00376   r_type = ELF32_R_TYPE (elf_reloc->r_info);
00377 
00378   if (r_type <= R_ARM_GNU_VTINHERIT)
00379     bfd_reloc->howto = & elf32_arm_howto_table[r_type];
00380   else
00381     bfd_reloc->howto = find_howto (r_type);
00382 }
00383 
00384 struct elf32_arm_reloc_map
00385   {
00386     bfd_reloc_code_real_type bfd_reloc_val;
00387     unsigned char elf_reloc_val;
00388   };
00389 
00390 static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
00391   {
00392     {BFD_RELOC_NONE,                 R_ARM_NONE },
00393     {BFD_RELOC_ARM_PCREL_BRANCH,     R_ARM_PC24 },
00394     {BFD_RELOC_32,                   R_ARM_ABS32 },
00395     {BFD_RELOC_32_PCREL,             R_ARM_REL32 },
00396     {BFD_RELOC_8,                    R_ARM_ABS8 },
00397     {BFD_RELOC_16,                   R_ARM_ABS16 },
00398     {BFD_RELOC_ARM_OFFSET_IMM,       R_ARM_ABS12 },
00399     {BFD_RELOC_ARM_THUMB_OFFSET,     R_ARM_THM_ABS5 },
00400     {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22 },
00401     {BFD_RELOC_NONE,                 R_ARM_SBREL32 },
00402     {BFD_RELOC_NONE,                 R_ARM_AMP_VCALL9 },
00403     {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_PC11 },
00404     {BFD_RELOC_THUMB_PCREL_BRANCH9,  R_ARM_THM_PC9 },
00405     {BFD_RELOC_VTABLE_INHERIT,       R_ARM_GNU_VTINHERIT },
00406     {BFD_RELOC_VTABLE_ENTRY,         R_ARM_GNU_VTENTRY }
00407   };
00408 
00409 static reloc_howto_type *
00410 elf32_arm_reloc_type_lookup (abfd, code)
00411      bfd * abfd ATTRIBUTE_UNUSED;
00412      bfd_reloc_code_real_type code;
00413 {
00414   unsigned int i;
00415 
00416   for (i = NUM_ELEM (elf32_arm_reloc_map); i--;)
00417     if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
00418       return & elf32_arm_howto_table [elf32_arm_reloc_map[i].elf_reloc_val];
00419 
00420   if (code == BFD_RELOC_ARM_PLT32)
00421     return find_howto (R_ARM_PLT32);
00422 
00423   return NULL;
00424 }
00425 
00426 #include "elf32-arm.h"